Structural studies on rabbit muscle glycogen synthase. II. Limited proteolysis
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چکیده
منابع مشابه
Structural Studies on Rabbit Muscle Glycogen Synthase
Limited tryptic digestion of either synthase I or D forms resulted in the appearance of a new glucose 6-phosphate-dependent form which was composed of 75,000 molecular weight subunits. Early in tryptic digestion, an intermediate 78,000 subunit was also observed with both forms of the enzyme. The NH,terminal dipeptide sequence of the 75,000 subunit of both forms was the same as that of the origi...
متن کاملHormonal regulation of glycogen synthase phosphorylation in rabbit skeletal muscle.
Phosphorylation of rabbit skeletal muscle glycogen synthase in vivo in response to hormones was investigated. Methods were developed to purify the synthase without altering its kinetic parameters, thereby indicating constancy of the synthase phosphorylation state. The enzyme from control rabbits had an activity ratio (-glucose-6-P/+glucose-6-P) of 0.24, K, for glucose-6P of 0.17 m ~ , and K , f...
متن کاملRabbit Liver Glycogen Synthase Kinases
A rabbit liver protein kinase (PCO.,), able to phosphorylate glycogen synthase and phosvitin, has been extensively purified. The enzyme had apparent M, = 170,000-190,000 as judged by gel filtration and was associated with two major polypeptide species, a (Mr = 43,000) and lp (Mr = 25,000). Two other polypeptides, Mr = 38,000 and M, = 35,000, were also detected. Treatment with trypsin led to an...
متن کاملRabbit Skeletal Muscle Glycogen
Glycogen in its particulate beta-form is localized in the sarcoplasm close to the sarcoplasmic reticulum. Some particles are in close contact with the membranes, on the outer side of the vesicles. The mild technique of differential precipitation-centrifugation has been adapted to the preparation of glycogen from adult skeletal muscle. A preliminary low-speed centrifugation which eliminates the ...
متن کاملStructural determinants of limited proteolysis.
Limited or regulatory proteolysis plays a critical role in many important biological pathways like blood coagulation, cell proliferation, and apoptosis. A better understanding of mechanisms that control this process is required for discovering new proteolytic events and for developing inhibitors with potential therapeutic value. Two features that determine the susceptibility of peptide bonds to...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1975
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(19)40677-7